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- W4241545749 abstract "The incorporation of several special-purpose valves sets a process gas chromatograph (PGC) apart from most laboratory gas chromatographs. Nearly all chromatographic valves are binary devices having just two positions. Most operate from instrument air, but a few use carrier gas pressure. Early PGC developers devised custom assemblies of readily-available solenoid valves to inject gas samples. But they soon realized that the unpurged passages (called dead legs) that are present in any assembly of off-the-shelf instrument valves cause gross peak widening, which spoils the separation of peaks. The spool valve, sometimes called a piston valve, is a linear-motion device used in many early models of PGC for gas sample injection and column switching. The slide valve (also called a sliding-plate valve) is also a linear-motion valve, but with smaller and smoother flow paths than the spool valve." @default.
- W4241545749 created "2022-05-12" @default.
- W4241545749 date "2020-06-03" @default.
- W4241545749 modified "2023-10-03" @default.
- W4241545749 title "Chromatographic valves" @default.
- W4241545749 cites W2066858524 @default.
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- W4241545749 doi "https://doi.org/10.1002/9781119632993.ch8" @default.
- W4241545749 hasPublicationYear "2020" @default.
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